A diagnosis of CREST requires positive bloodwork of some sort, if you don't have sclerodactyly and the antibodies found in labs are very important as they can indicate what sort of things you might be looking at in future and treatment plans to avoid them if possible or early interventions. There's like 8 or 10 different one in systemic sclero. Like Vee said neuropathy can be caused by capillary damage like that caused by Raynaud's. I have to go on gabapentin every once in a while because of it. I do hope you get some answers or some relief soon!